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Citation: Wenlong LI, Xinyu JIA, Jie LING, Mengdan MA, Anning ZHOU. Photothermal catalytic CO2 hydrogenation over a Mg-doped In2O3-x catalyst[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(5): 919-929. doi: 10.11862/CJIC.20230421 shu

Photothermal catalytic CO2 hydrogenation over a Mg-doped In2O3-x catalyst

  • 1.

    College of Chemistry & Chemical Engineering, Xi′an University of Science and Technology, Xi′an 710054, China

  • 2.

    Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi′an, Shaanxi 710054, China

Figures(7)

  • To improve the catalytic activity of the photothermal CO2 hydrogenation In2O3 catalyst, a Mg(OH)2-In(OH)3 precursor was prepared by the homogeneous hydrothermal method, and a Mg-doped In2O3-x (Mg-In2O3-x) catalyst enriched with oxygen vacancies was obtained by the following high-temperature calcination and H2-reducing treatment. The catalyst was evaluated for its photothermal catalytic performance of CO2 hydrogenation in a photothermal fixed -bed reactor. The results demonstrated that Mg-In2O3-x achieved an impressive CO2 conversion rate of 31.20% with a CO production rate of 14.22 mmol·gcat-1·h-1 and selectivity of 100% in the light reaction at 300 ℃. The characterization results confirmed that the Mg doping into the In2O3 lattice promotes the formation of more surface oxygen vacancies, which dramatically increases the response efficiency to visible light and slows down the recombination of photogenerated electron-hole. This is the main reason for the enhancement of the photothermal catalytic performance.
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